package com.mmall.service.impl;

import com.mmall.common.Const;
import com.mmall.common.ServerResponse;
import com.mmall.common.TokenCache;
import com.mmall.dao.UserMapper;
import com.mmall.pojo.User;
import com.mmall.service.IUserService;
import com.mmall.util.MD5Util;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import javax.xml.ws.ServiceMode;
import java.util.UUID;

/**
 * Created by pussycat on 2018/6/14.
 */
@Service("iUserService")
public class UserServiceImpl implements IUserService {
    @Autowired
    private UserMapper userMapper;

    @Override
    public ServerResponse<User> login(String username, String password) {
        int resultCount = userMapper.checkUsername(username);
        if(resultCount == 0){
            return ServerResponse.createByErrorMessage("用户名不存在");
        }

        String md5Password = MD5Util.MD5EncodeUtf8(password);
        User user = userMapper.selectLogin(username, md5Password);
        if(user == null){
            return ServerResponse.createByErrorMessage("密码错误");
        }

        user.setPassword(StringUtils.EMPTY);

        return ServerResponse.createBySuccess("登录成功", user);
    }

    public ServerResponse<String> register(User user){
//        int resultCount = userMapper.checkUsername(user.getUsername());
//        if(resultCount > 0){
//            return ServerResponse.createByErrorMessage("用户名已存在");
//        }
//        resultCount = userMapper.checkEmail(user.getEmail());
//        if(resultCount > 0){
//            return ServerResponse.createByErrorMessage("email已存在");
//        }

        ServerResponse vaildResponse = this.checkVaild(user.getUsername(), Const.USERNAME);
        if (!vaildResponse.isSuccess()){
            return vaildResponse;
        }

        vaildResponse = this.checkVaild(user.getEmail(), Const.EMAIL);
        if (!vaildResponse.isSuccess()){
            return vaildResponse;
        }

        user.setRole(Const.Role.ROLE_CUSTOMER);

        user.setPassword(MD5Util.MD5EncodeUtf8(user.getPassword()));

        int resultCount = userMapper.insert(user);
        if(resultCount == 0){
            return ServerResponse.createByErrorMessage("注册失败");
        }
        return ServerResponse.createBySuccessMessage("注册成功");
    }

    public ServerResponse<String> checkVaild(String str, String type){
        if(StringUtils.isNoneBlank(type)) {
            if (Const.USERNAME.equals(type)) {
                int resultCount = userMapper.checkUsername(str);
                if (resultCount > 0) {
                    return ServerResponse.createByErrorMessage("用户名已存在");
                }
            }
            if (Const.EMAIL.equals(type)){
                int resultCount = userMapper.checkEmail(str);
                if(resultCount > 0){
                    return ServerResponse.createByErrorMessage("email已存在");
                }
            }
        } else {
            return ServerResponse.createByErrorMessage("参数错误");
        }
        return ServerResponse.createBySuccessMessage("校验成功");
    }

    public ServerResponse selectQuestion(String username){
        ServerResponse vaildResponse = this.checkVaild(username, Const.USERNAME);
        if(vaildResponse.isSuccess()){
            return ServerResponse.createByErrorMessage("用户不存在");
        }
        String question = userMapper.selectQuestionByUsername(username);
        if(StringUtils.isNoneBlank(question)){
            return ServerResponse.createBySuccess(question);
        }
        return ServerResponse.createByErrorMessage("找回密码的问题是空的");
    }

    public ServerResponse<String> checkAnswer(String username, String question, String answer){
        int resultCount = userMapper.checkAnswer(username, question, answer);
        if (resultCount > 0) {
            String forgetToken = UUID.randomUUID().toString();
            TokenCache.setKey("token_" + username, forgetToken);
            return ServerResponse.createBySuccess(forgetToken);
        }
        return ServerResponse.createByErrorMessage("问题的答案错误");
    }

    public ServerResponse<String> forgetRestPassword(String username, String passwordNew, String forgetToken){
        if (StringUtils.isBlank(forgetToken)){
            return ServerResponse.createByErrorMessage("参数错误，TOKEN需要传递");
        }
        ServerResponse vaildResponse = this.checkVaild(username, Const.USERNAME);
        if(vaildResponse.isSuccess()){
            return ServerResponse.createByErrorMessage("用户不存在");
        }
        String token = TokenCache.getKey("token_" + username);
        if (StringUtils.isBlank(token)) {
            return ServerResponse.createByErrorMessage("token无效或过期");
        }

        if(StringUtils.equals(forgetToken, token)) {
            String md5Password = MD5Util.MD5EncodeUtf8(passwordNew);
            int rowCount = userMapper.updatePasswordByUsername(username, passwordNew);

            if (rowCount > 0) {
                return ServerResponse.createBySuccessMessage("修改密码成功");
            }
        } else {
            return ServerResponse.createByErrorMessage("token错误，请重新获取重置密码的token");
        }
        return ServerResponse.createByErrorMessage("修改密码失败");
    }

    public ServerResponse<String> resetPassword(String passwordOld, String passwordNew, User user){
        //防止横行越权,要校验一下这个用户的旧密码，一定要指定这个用户,因为我们会查询一个count（1），如果不指定id，那么结果就是true啦count>0；
        int resultCount = userMapper.checkPassword(MD5Util.MD5EncodeUtf8(passwordOld), user.getId());
        if (resultCount == 0) {
            return ServerResponse.createByErrorMessage("旧密码错误");
        }

        user.setPassword(MD5Util.MD5EncodeUtf8(passwordNew));
        int updateCount = userMapper.updateByPrimaryKeySelective(user);
        if (updateCount > 0) {
            return ServerResponse.createBySuccessMessage("密码更新成功");
        }
        return ServerResponse.createByErrorMessage("密码更新失败");

    }

    public ServerResponse<User> updateInformation(User user){
        int resultCount = userMapper.checkEmailByUserId(user.getEmail(), user.getId());
        if (resultCount > 0) {
            return ServerResponse.createByErrorMessage("email已经存在， 请更换email再尝试更新");
        }
        User updateUser = new User();
        updateUser.setId(user.getId());
        updateUser.setEmail(user.getEmail());
        updateUser.setPhone(user.getPhone());
        updateUser.setQuestion(user.getQuestion());
        updateUser.setAnswer(user.getAnswer());

        int updateCount = userMapper.updateByPrimaryKeySelective(updateUser);

        if (updateCount >0) {
            return ServerResponse.createBySuccess("更新个人信息成功", updateUser);
        }
        return ServerResponse.createByErrorMessage("更新个人信息失败");
    }

    public ServerResponse<User> getInformation(Integer userId) {
        User user = userMapper.selectByPrimaryKey(userId);
        if (user == null) {
            return ServerResponse.createByErrorMessage("找不到当前用户");
        }
        user.setPassword(StringUtils.EMPTY);
        return ServerResponse.createBySuccess(user);
    }

    //backend

    public ServerResponse checkAdminRole(User user) {
        if (user != null && user.getRole().intValue() == Const.Role.ROLE_ADMIN) {
            return ServerResponse.createBySuccess();
        }
        return ServerResponse.createByError();
    }
}
